Fig. 4.

The MRI-based radiomics nomogram for LN metastasis prediction in patients with BCa. (a) Radiomics nomogram developed for the prediction of LN metastasis. Plots (b) and (c) show the ROC curves of the radiomics nomogram in the training and validation sets, respectively. Plots (d) and (e) present the calibration curves of the nomogram in the training and validation sets, respectively. The calibration curve illustrates the calibration of the nomogram in terms of the agreement between the predicted risk of LN metastasis and the observed outcomes of LN metastasis. The 45° solid grey line represents a perfect prediction, and the dotted red line represents the predictive performance of the nomogram. The dotted line has a closer fit to the solid line, which indicates better predictive accuracy of the nomogram.